This article will explain the overview of slips and elevator which are very important tool on the rig.
Slips are wedge-shaped gripping devices which are used to suspend the drill string in the hole. They fit around the body of drill pipe and wedge in the taper of the rotary table’s opening. Slips have serrated inserts or dies that will grip the outside diameter of the tubular when it is set on the rotary table. To set the slips, rig crews place them around the pipe and the driller then slowly lowers the pipe until the slips can take up the load. The dies in the slips will firmly hold the pipe. In order to remove the slips, rig crew grasp the slip handles and as the driller picks up the pipe, they lift them out of the rotary table opening and set them aside.
You can watch this video to see how the rig crew set and remove the slips
This video shows detailed about top drive from Varco with a lot of operation aspect and it will help you learn a lot of details about Top Drive. We already add full the video transcript in order to help people understand all details.
This is very interesting to see how the body of drill pipe and tool joint together using the rotary friction welding.
The friction welding or FRW is solid-state welding process which generates the heat using the friction between the work pieces in relative motion to each other, with addition of lateral force known as “upset” in order to displace and fuse materials plastically. Technically, no melt takes place and in the traditional sense friction welding isn’t a process of welding, rather it is a forging technique. Because of similarities between traditional welding and these techniques, it has become a commonly used term. The friction welding is used with thermoplastics and metals in a variety of automotive and aviation applications.
A top drive is a big motor system which is hoisted in a derrick or mast of a drilling rig. A top drive is a modern rotating system which has been popular for many drilling contractors and oil operators. Top drives can be used on all types of rigs, from truck-mounted rigs to offshore rigs.
Rotation provided to a drill stem is accomplished by a top drive. Therefore, a Kelly and a Kelly bushing are not required for a top drive system. Moreover, a master bushing and a rotary table serves as support for slip and weight of a drill stem and as a conduit for a drill stem to be raised or lowed into a wellbore. Continue reading →
This is the brief explanation of a Kelly rotating system on the rig. Kelly rig is on an old style rigs and nowadays it is mostly used on land operations. For offshore operation, a top drive system is used instead.
First of all, it is important for new people to look at these images before reading the information below because they show the equipment’s name and where they are on the rig.